Cannot enable SSL for oslo_service wsgi server

[Matt Parkinson]

I am trying to enable SSL for an oslo WSGI service. The service is heavily based on the novajoin project.

To enable SSL, I have added the "use_ssl" flag when initialising the oslo WSGI service:

self.server = wsgi.Server(CONF, name, self.app, host=self.host, port=self.port, use_ssl=True)

The following was added to the configuration file:

[ssl]
cert_file = /etc/pki/tls/certs/vendordata.crt
key_file = /etc/pki/tls/private/vendordata.key

The service starts and begins listening on the port, however any attempt by a client to connect hangs, and results in the following errors:

Traceback (most recent call last):
  File "/usr/lib/python2.7/site-packages/eventlet/hubs/poll.py", line 115, in wait
    listener.cb(fileno)
  File "/usr/lib/python2.7/site-packages/eventlet/greenthread.py", line 214, in main
    result = function(*args, **kwargs)
  File "/usr/lib/python2.7/site-packages/eventlet/wsgi.py", line 880, in server
    client_socket = sock.accept()
  File "/usr/lib64/python2.7/ssl.py", line 884, in accept
    server_side=True)
  File "/usr/lib64/python2.7/ssl.py", line 348, in wrap_socket
    _context=self)
  File "/usr/lib64/python2.7/ssl.py", line 603, in __init__
    server_hostname, ssl_sock=self)
TypeError: _wrap_socket() argument 1 must be _socket.socket, not GreenSocket
Removing descriptor: 7

I have seen a couple of hits for this error related to the eventlet version, but it looks like I should have working versions.

Python version: 2.7.5
eventlet version: 0.20.1
oslo_service version: 1.29.0

I'm not convinced yet this is an oslo_service bug, but I am running out of ideas.

Thanks

[Matt Parkinson (mattparko)]

This is not a bug. I was able to fix my issue using eventlet.monkey_patch() before initialising the oslo wsgi server